What is "nip-up"

A nip-up is an acrobatic spring from a supine position to a standing position. It is executed by propelling the body away from the floor so that the performer is momentarily airborne, and typically ends with the performer standing in a squatting position. It is performed in a variety of activities, including acro dance, breakdancing, gymnastics, martial arts, professional wrestling, parkour and freerunning.